Testing and debugging improvements with support for Minitest 2.10 and RSpec 2.8

Git revisions graph and other VCS support enhancements

Note that RubyMine 4.0 is a free update for everyone who purchased their RubyMine license after Feb 15, 2011. And as usual, a 30-day trial is available if you want to try RubyMine as your new Ruby on Rails IDE.

RubyMine 4.0 took time to appear but we are very happy with the result and want to heartily thank all the early adopters for their invaluable feedback.